JPH055025Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to writing instruments such as marking pens that apply ink, cosmetic tools such as manicures that apply nail polish liquid, and other instruments that generally apply liquids.

[Conventional technology]

Conventionally, this type of liquid applicator has a liquid reservoir in the rear half of the barrel, an applicator attached to the tip of the barrel, and a valve device interposed between the liquid reservoir and the applicator. do. These valve devices have a structure in which the liquid reservoir, which opens the valve by a knock operation, etc., and the distal end containing the application member are in direct communication, so if the knock time is too long, the amount of liquid supplied to the application member will be excessive. There are disadvantages such as the disadvantage that when the air in the liquid reservoir expands due to a rise in temperature or the like, the liquid blows out violently when the valve is opened. This drawback cannot be overcome even in a device that has valves in two locations, such as that shown in Japanese Utility Model Application Publication No. 57-132591, because there is a moment when the two valves open at the same time. Ta.

[Problem that the invention attempts to solve]

The object of the present invention is to eliminate the above-mentioned drawbacks, that is, to provide a liquid applicator that maintains an appropriate amount of liquid supplied to the applicator member and does not cause any liquid to blow out.

(Means for Solving the Problems) The liquid applicator for writing instruments, cosmetics, etc. of the present application devised to achieve the above object has a liquid reservoir in the rear half of the barrel, and a tip of the barrel. In a liquid applicator such as a writing instrument or a cosmetic device in which an applicator is attached to the applicator and a valve device is interposed between the liquid reservoir and the applicator, a valve chamber is formed behind the valve seat, and a valve chamber is formed at the front end of the valve chamber. A first cylinder part and a second cylinder part are provided at the rear end thereof, and the valve stem has a first external protrusion that is slidable in watertight contact with the first cylinder part, and a first external protrusion that is slidable in watertight contact with the first cylinder part. A second outer surface protrusion that is slidable in watertight contact with the second cylinder portion is provided, and a flow groove having a predetermined length in the axial direction is provided in the second cylinder portion. When the outer protrusion slides in the range from the front end to the vicinity of the rear end of the first cylinder part, the front end of the circulation groove is always located forward of the second outer protrusion, and the rear end of the circulation groove is It is always located at the rear of the second outer surface protrusion, and when the first outer surface protrusion is located at the rear end of the first cylinder part, the second outer surface is located at the rear of the rear end of the flow groove. By appropriately setting the length of the first cylinder part, the length of the circulation groove, and the rear end position of the circulation groove so as to be located in the second cylinder part, the first cylinder part and the first outer surface It is characterized in that liquid can be temporarily stored in a valve chamber separated by the protrusion, the second cylinder part, and the second outer protrusion.

〔Example〕

The figure shows one embodiment of the present invention, which will be explained in detail below based on the drawing. This embodiment shows a writing instrument. First, the overall structure will be outlined with reference to FIG. 3 is attached, a tip barrel 4 is screwed to the front end of the barrel tube 1, and a pen core 5 is attached to the tip barrel 4 so as to be movable in the axial direction.
The rear end of the pen core 5 is connected to the valve stem 6 of the valve device 3, so that the valve opens when the valve stem 6 is moved by the notch in the pen core 5. Next, the valve device 3, which is the main part of the present invention, will be explained in detail.The valve device 3 includes, in addition to the valve stem 6, a valve seat 7, a valve spring 8, and a valve cylinder 9. is fitted inside the first half of the valve cylinder 9, and the valve opening 1 of the valve cylinder 9 and the valve seat 7
The internal space behind 0 is the valve chamber 11, and the valve seat 7
A first cylinder portion 12 is integrally provided at the rear end portion, a second cylinder portion 13 is integrally provided at the rear end portion of the valve cylinder 9, and assembled so as to penetrate the valve seat 7 and the valve cylinder 9. The valve stem 6 has a front inclined portion that is attached to the valve seat 7.
A first outer surface protrusion 14 is provided which sits on the surface of the first cylinder part 12 and whose distal peripheral edge slides in watertight contact with the inner surface of the first cylinder part 12. A second outer surface protrusion 15 that slides in watertight contact with the inner surface of the valve is provided, and a valve stem 6 is disposed between the rear surface of the second outer surface protrusion 15 and the rear end step of the valve barrel 9. A valve spring 8 biased forward is stretched, a flow groove 16 of a required length is provided in the axial direction at a required position on the inner peripheral surface of the front end of the second cylinder portion 13, and a flow groove 16 of a required length is provided in the axial direction. When the protrusion 14 slides in the range from the front end to the vicinity of the rear end of the first cylinder part 12, the front end of the circulation groove 16 is always located forward of the second outer protrusion 15, and the circulation groove 16
The rear end is always located behind the second external projection 15, and when the first external projection 14 of the valve stem 6 is located at the rear end of the first cylinder part 12, the second external projection 15 The length of the first cylinder part 12, the length of the circulation groove 16, and the rear end position are set appropriately so that the part 15 is located in the second cylinder part 13 behind the rear end of the circulation groove 16. has been done.

Note that in the above embodiment, the first cylinder portion 12
Although the second cylinder portion 13 and the second cylinder portion 13 are integrally formed with the valve seat 7 and the valve cylinder 9, it is also possible to form them as separate parts and attach them to the valve seat 7 and the valve cylinder 9. .

[Effect]

The operation will be explained below based on the above embodiment. First, as shown in FIG. 1, when the pen core 5 is in the non-knocked state, the valve stem 6 is energized by the valve spring 8 to seat the front inclined portion of the first external protrusion 14 on the valve seat 7, and The distal end peripheral edge of the first outer surface protrusion 14 is located at the front end of the first cylinder section 12. At this time, the valve chamber 11 communicates with the ink reservoir 2 through the flow groove 16, and ink flows into the valve chamber 11, but ink supply from the valve chamber 11 to the pen core 5 is blocked. Next, in the state shown in FIG. 2 in which the pen core 5 is knocked and the first outer protrusion 14 of the valve stem 6 is positioned at the rear end of the first cylinder part 12, the second outer protrusion 15 is Since the flow groove 16 moves backward from the rear end, the valve chamber 11 and the ink reservoir 2 are out of communication with each other, and the ink supply from the valve chamber 11 to the pen core 5 is still blocked, so that the ink is not transferred to the valve chamber. It is stored in 11. When the knocking stroke of the pen core 5 is further increased, the first outer protrusion 14 of the valve stem 6 moves to the rear of the first cylinder part 12 and becomes the state shown in FIG. The amount of ink that was previously supplied passes through the valve port 10 and is supplied to the pen core 5. Of course, at this time, the valve chamber 11 and the ink reservoir 2 are out of communication. After this, when the lock on the pen core 5 is released, the state shown in FIG. 1 is restored. That is, the ink does not go directly from the ink reservoir 2 to the pen core 5, but is temporarily isolated and stored in the valve chamber 11 on the way, and then the amount of ink stored in the valve chamber 11 is transferred to the pen core 5. It is supplied.

[Effect of idea]

The structure and operation of the present invention are as described above, and in particular, when the first outer surface protrusion of the valve stem slides in the range from the front end of the first cylinder part to the vicinity of the rear end, the front end of the flow groove is always located in front of the second external protrusion, the rear end of the flow groove is always located in the rear of the second external protrusion, and the first external protrusion is located at the rear end of the first cylinder part. When the second outer surface protrusion is located at the second outer surface protrusion, the second
By appropriately setting the length of the first cylinder part, the length of the circulation groove, and the rear end position of the circulation groove so that the first cylinder part and the first outer surface protrusion are located in the cylinder part of Since the liquid can be temporarily stored in the valve chamber separated by the second cylinder part and the second outer surface protrusion, it is possible to prevent excessive supply of liquid to the applicator and to avoid the possibility of over-supplying the liquid to the application member or preventing the liquid from flowing inside the liquid storage part. This has the effect of reliably preventing accidents such as blowing out of liquid that occurs when air expands.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a longitudinal cross-sectional view of the entire valve chamber with the ink reservoir communicating with it, and Figure 2 is a longitudinal cross-sectional view of the main part with the valve chamber isolated. FIG. 3 is a vertical cross-sectional view of a main part showing the ink supply state from the valve chamber to the pen core, and FIG. 4 is a cross-sectional view taken along line A--A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Barrel cylinder, 2... Ink reservoir, 3... Valve device, 4... Tip barrel, 5... Pen core, 6... Valve stem, 7
...Valve seat, 8...Valve spring, 9...Valve cylinder, 10...
Valve port, 11... Valve chamber, 12... First cylinder part, 13... Second cylinder part, 14... First
External protrusion, 15...Second external protrusion, 16
... Distribution channel.

Claims (1)

[Scope of utility model registration request] In liquid applicators such as writing instruments and cosmetics, in which a liquid reservoir is provided in the rear half of the barrel, an applicator is attached to the tip of the barrel, and a valve device is interposed between the liquid reservoir and the applicator. A valve chamber is formed at the rear of the valve chamber, a first cylinder section is provided at the front end of the valve chamber, and a second cylinder section is provided at the rear end, and the valve stem is provided with the first cylinder section.
The first part is slidable in watertight contact with the cylinder part of the
and a second outer surface protrusion that can slide in watertight contact with the second cylinder part behind the second cylinder part, and the second cylinder part has a flow groove of a required length in the axial direction. and when the first outer protrusion of the valve stem slides in a range from the front end of the first cylinder part to near the rear end, the front end of the flow groove is always located forward of the second outer protrusion. At the same time, the rear end of the flow groove is always located behind the second outer surface protrusion, and when the first outer surface protrusion is located at the rear end of the first cylinder part, the second outer surface protrusion is located behind the second outer surface protrusion. By appropriately setting the length of the first cylinder part, the length of the circulation groove, and the rear end position of the circulation groove so that the second cylinder part is located behind the rear end of the groove, A writing instrument characterized in that a liquid can be temporarily stored in a valve chamber separated by a cylinder portion and a first outer surface protrusion, and a second cylinder portion and a second outer surface protrusion. Liquid applicators such as cosmetics.